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Interactions médicamenteuses

Amobarbital + Warfarin

Gravité: Majeure

Amobarbital and Warfarin: major interaction.

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Résumé

Barbiturates induce hepatic enzymes and accelerate warfarin metabolism, lowering INR and reducing anticoagulant protection. The effect develops over weeks and persists after the barbiturate is stopped, with risk of rebound overanticoagulation.

Ce que signifie cette interaction, en termes simples

Amobarbital and Warfarin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.

Amobarbital belongs to Central Nervous System; Warfarin belongs to Cardiovascular.

Niveau de preuve: High

Pourquoi elle survient

Induction of hepatic CYP enzymes (including CYP2C9 and CYP3A4) increasing warfarin clearance.

Conduite à tenir

Monitor INR frequently and increase the warfarin dose as required. Reduce the dose and recheck INR when the barbiturate is discontinued.

Questions à poser à votre pharmacien

  • Does the benefit of taking both outweigh the risk in my case?
  • Do I need any blood test, ECG or other check while on both?
  • What early warning signs should I watch for, and what should I do if they appear?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Questions fréquentes

Can I take Amobarbital with Warfarin?

MediHelp rates the interaction as major. Amobarbital and Warfarin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Barbiturates induce hepatic enzymes and accelerate warfarin metabolism, lowering INR and reducing anticoagulant protection. The effect develops over weeks and persists after the barbiturate is stopped, with risk of rebound overanticoagulation.

How serious is the interaction between Amobarbital and Warfarin?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor INR frequently and increase the warfarin dose as required. Reduce the dose and recheck INR when the barbiturate is discontinued.

What other medicines interact with Warfarin?

MediHelp also lists interactions of Warfarin with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Warfarin page.

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Ouvrez le référentiel complet, vérifiez les interactions entre plusieurs médicaments et utilisez les outils de posologie dans l'application MediHelp.

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